I opened it a lot because when I made the hole it busted.
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I'm sorry for responding so slowly this morning. I have a terrible migraine.
I do see the full veins but it's not far from finishing absorbing the blood. I can't see the bill but if it's where @julskinka is suggesting you can carefully open a small area in the membrane between blood vessels to let oxygen in. If you decide to do that and accidentally hit a blood vessel then apply light pressure with a q-tip and continue to wait. You can also wait until the blood is almost completely gone and then go in to investigate. This is a safer method to not nick any blood vessels but timing is very very important so the chick doesn't suffocate.